Relief Valves

Relief valves can be used as a primary pressure control device, or as a secondary (safety) pressure relief. Many systems also use two relief valves with one set as the primary pressure control and the other set as a secondary relief.

When used as a primary pressure control device, the relief valve is used to set and maintain consistent system pressure in applications where flow and pressure demands are continuous or in applications where demand changes; when using multiple trigger guns, a downstream solenoid (gate) valve is closed, or a nozzle is clogged. When system pressure is achieved, excess flow is by-passed back to the pump inlet, to a tank, or to drain.

When configured as a secondary pressure control device, the relief valve provides pressure relief if the primary pressure control valve malfunctions. The secondary relief valve will open to relieve system pressure protecting the pump and system from damage caused by over-pressurization. A secondary relief valve can save costly pump and system damage, and more importantly, it’s an added safety feature to protect those working around the equipment.

Product Range:
0 to 320 GPM, 0 to 10,000 PSI

Typical Usage:
Used for single pump, multiple pumps, nozzle and gun applications.

Materials:
Available in brass, 304 and 316 stainless steel

Elastomers:
Medium nitrile buna (NBR), fluorocarbon (FPM), ethylene proplylene diene monomer (EPDM), and more.